with-fluids bug?

[Stefan Israelsson Tampe]

Hi,

Here follows an issue with resent head and a potential first start
of a solution.

Problem:
(define a (make-fluid))
(with-fluids ((a 1)) 2)  ; returns 2
(pk (with-fluids ((a 1)) 2)) ; barfs at trying to execute function 1

The issue:
the wind-fluids instruction reads previouslyu pushed fluids and vals
and set their value acordingly. But does just do a read and no pop!
by simply adding sp -= 2*n, the code above works fine. 

Now, I'm not an expert at coding vm-instruction, there might be more to
say here but a patch follows this mail.

Regards
Stefan

with-dynwind-vm.patch
Description: Text Data